mirror of https://gitee.com/openkylin/linux.git
tty: powerpc: remove hvc_iseries
The PowerPC legacy iSeries platform is being removed, so this code is no longer needed. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Stephen Rothwell
Benjamin Herrenschmidt
parent
7834799a6c
commit
b66808910d
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@ -24,16 +24,6 @@ config HVC_OLD_HVSI
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depends on HVC_CONSOLE
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depends on HVC_CONSOLE
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default n
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default n
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config HVC_ISERIES
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bool "iSeries Hypervisor Virtual Console support"
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depends on PPC_ISERIES
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default y
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select HVC_DRIVER
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select HVC_IRQ
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select VIOPATH
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help
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iSeries machines support a hypervisor virtual console.
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config HVC_OPAL
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config HVC_OPAL
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bool "OPAL Console support"
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bool "OPAL Console support"
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depends on PPC_POWERNV
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depends on PPC_POWERNV
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@ -1,7 +1,6 @@
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obj-$(CONFIG_HVC_CONSOLE) += hvc_vio.o hvsi_lib.o
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obj-$(CONFIG_HVC_CONSOLE) += hvc_vio.o hvsi_lib.o
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obj-$(CONFIG_HVC_OPAL) += hvc_opal.o hvsi_lib.o
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obj-$(CONFIG_HVC_OPAL) += hvc_opal.o hvsi_lib.o
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obj-$(CONFIG_HVC_OLD_HVSI) += hvsi.o
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obj-$(CONFIG_HVC_OLD_HVSI) += hvsi.o
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obj-$(CONFIG_HVC_ISERIES) += hvc_iseries.o
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obj-$(CONFIG_HVC_RTAS) += hvc_rtas.o
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obj-$(CONFIG_HVC_RTAS) += hvc_rtas.o
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obj-$(CONFIG_HVC_TILE) += hvc_tile.o
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obj-$(CONFIG_HVC_TILE) += hvc_tile.o
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obj-$(CONFIG_HVC_DCC) += hvc_dcc.o
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obj-$(CONFIG_HVC_DCC) += hvc_dcc.o
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@ -1,599 +0,0 @@
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/*
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* iSeries vio driver interface to hvc_console.c
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*
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* This code is based heavily on hvc_vio.c and viocons.c
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*
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* Copyright (C) 2006 Stephen Rothwell, IBM Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdarg.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/console.h>
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#include <asm/hvconsole.h>
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#include <asm/vio.h>
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#include <asm/prom.h>
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#include <asm/firmware.h>
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#include <asm/iseries/vio.h>
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#include <asm/iseries/hv_call.h>
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#include <asm/iseries/hv_lp_config.h>
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#include <asm/iseries/hv_lp_event.h>
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#include "hvc_console.h"
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#define VTTY_PORTS 10
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static DEFINE_SPINLOCK(consolelock);
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static DEFINE_SPINLOCK(consoleloglock);
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static const char hvc_driver_name[] = "hvc_console";
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#define IN_BUF_SIZE 200
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/*
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* Our port information.
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*/
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static struct port_info {
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HvLpIndex lp;
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u64 seq; /* sequence number of last HV send */
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u64 ack; /* last ack from HV */
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struct hvc_struct *hp;
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int in_start;
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int in_end;
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unsigned char in_buf[IN_BUF_SIZE];
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} port_info[VTTY_PORTS] = {
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[ 0 ... VTTY_PORTS - 1 ] = {
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.lp = HvLpIndexInvalid
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}
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};
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#define viochar_is_console(pi) ((pi) == &port_info[0])
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static struct vio_device_id hvc_driver_table[] __devinitdata = {
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{"serial", "IBM,iSeries-vty"},
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{ "", "" }
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};
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MODULE_DEVICE_TABLE(vio, hvc_driver_table);
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static void hvlog(char *fmt, ...)
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{
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int i;
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unsigned long flags;
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va_list args;
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static char buf[256];
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spin_lock_irqsave(&consoleloglock, flags);
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va_start(args, fmt);
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i = vscnprintf(buf, sizeof(buf) - 1, fmt, args);
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va_end(args);
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buf[i++] = '\r';
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HvCall_writeLogBuffer(buf, i);
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spin_unlock_irqrestore(&consoleloglock, flags);
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}
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/*
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* Initialize the common fields in a charLpEvent
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*/
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static void init_data_event(struct viocharlpevent *viochar, HvLpIndex lp)
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{
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struct HvLpEvent *hev = &viochar->event;
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memset(viochar, 0, sizeof(struct viocharlpevent));
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hev->flags = HV_LP_EVENT_VALID | HV_LP_EVENT_DEFERRED_ACK |
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HV_LP_EVENT_INT;
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hev->xType = HvLpEvent_Type_VirtualIo;
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hev->xSubtype = viomajorsubtype_chario | viochardata;
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hev->xSourceLp = HvLpConfig_getLpIndex();
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hev->xTargetLp = lp;
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hev->xSizeMinus1 = sizeof(struct viocharlpevent);
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hev->xSourceInstanceId = viopath_sourceinst(lp);
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hev->xTargetInstanceId = viopath_targetinst(lp);
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}
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static int get_chars(uint32_t vtermno, char *buf, int count)
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{
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struct port_info *pi;
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int n = 0;
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unsigned long flags;
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if (vtermno >= VTTY_PORTS)
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return -EINVAL;
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if (count == 0)
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return 0;
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pi = &port_info[vtermno];
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spin_lock_irqsave(&consolelock, flags);
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if (pi->in_end == 0)
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goto done;
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n = pi->in_end - pi->in_start;
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if (n > count)
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n = count;
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memcpy(buf, &pi->in_buf[pi->in_start], n);
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pi->in_start += n;
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if (pi->in_start == pi->in_end) {
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pi->in_start = 0;
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pi->in_end = 0;
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}
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done:
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spin_unlock_irqrestore(&consolelock, flags);
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return n;
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}
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static int put_chars(uint32_t vtermno, const char *buf, int count)
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{
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struct viocharlpevent *viochar;
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struct port_info *pi;
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HvLpEvent_Rc hvrc;
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unsigned long flags;
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int sent = 0;
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if (vtermno >= VTTY_PORTS)
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return -EINVAL;
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pi = &port_info[vtermno];
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spin_lock_irqsave(&consolelock, flags);
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if (viochar_is_console(pi) && !viopath_isactive(pi->lp)) {
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HvCall_writeLogBuffer(buf, count);
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sent = count;
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goto done;
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}
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viochar = vio_get_event_buffer(viomajorsubtype_chario);
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if (viochar == NULL) {
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hvlog("\n\rviocons: Can't get viochar buffer.");
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goto done;
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}
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while ((count > 0) && ((pi->seq - pi->ack) < VIOCHAR_WINDOW)) {
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int len;
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len = (count > VIOCHAR_MAX_DATA) ? VIOCHAR_MAX_DATA : count;
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if (viochar_is_console(pi))
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HvCall_writeLogBuffer(buf, len);
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init_data_event(viochar, pi->lp);
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viochar->len = len;
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viochar->event.xCorrelationToken = pi->seq++;
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viochar->event.xSizeMinus1 =
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offsetof(struct viocharlpevent, data) + len;
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memcpy(viochar->data, buf, len);
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hvrc = HvCallEvent_signalLpEvent(&viochar->event);
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if (hvrc)
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hvlog("\n\rerror sending event! return code %d\n\r",
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(int)hvrc);
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sent += len;
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count -= len;
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buf += len;
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}
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vio_free_event_buffer(viomajorsubtype_chario, viochar);
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done:
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spin_unlock_irqrestore(&consolelock, flags);
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return sent;
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}
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static const struct hv_ops hvc_get_put_ops = {
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.get_chars = get_chars,
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.put_chars = put_chars,
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.notifier_add = notifier_add_irq,
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.notifier_del = notifier_del_irq,
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.notifier_hangup = notifier_hangup_irq,
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};
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static int __devinit hvc_vio_probe(struct vio_dev *vdev,
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const struct vio_device_id *id)
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{
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struct hvc_struct *hp;
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struct port_info *pi;
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/* probed with invalid parameters. */
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if (!vdev || !id)
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return -EPERM;
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if (vdev->unit_address >= VTTY_PORTS)
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return -ENODEV;
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pi = &port_info[vdev->unit_address];
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hp = hvc_alloc(vdev->unit_address, vdev->irq, &hvc_get_put_ops,
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VIOCHAR_MAX_DATA);
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if (IS_ERR(hp))
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return PTR_ERR(hp);
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pi->hp = hp;
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dev_set_drvdata(&vdev->dev, pi);
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return 0;
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}
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static int __devexit hvc_vio_remove(struct vio_dev *vdev)
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{
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struct port_info *pi = dev_get_drvdata(&vdev->dev);
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struct hvc_struct *hp = pi->hp;
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return hvc_remove(hp);
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}
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static struct vio_driver hvc_vio_driver = {
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.id_table = hvc_driver_table,
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.probe = hvc_vio_probe,
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.remove = __devexit_p(hvc_vio_remove),
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.driver = {
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.name = hvc_driver_name,
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.owner = THIS_MODULE,
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}
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};
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static void hvc_open_event(struct HvLpEvent *event)
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{
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unsigned long flags;
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struct viocharlpevent *cevent = (struct viocharlpevent *)event;
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u8 port = cevent->virtual_device;
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struct port_info *pi;
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int reject = 0;
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if (hvlpevent_is_ack(event)) {
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if (port >= VTTY_PORTS)
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return;
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spin_lock_irqsave(&consolelock, flags);
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pi = &port_info[port];
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if (event->xRc == HvLpEvent_Rc_Good) {
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pi->seq = pi->ack = 0;
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/*
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* This line allows connections from the primary
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* partition but once one is connected from the
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* primary partition nothing short of a reboot
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* of linux will allow access from the hosting
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* partition again without a required iSeries fix.
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*/
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pi->lp = event->xTargetLp;
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}
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spin_unlock_irqrestore(&consolelock, flags);
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if (event->xRc != HvLpEvent_Rc_Good)
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printk(KERN_WARNING
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"hvc: handle_open_event: event->xRc == (%d).\n",
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event->xRc);
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if (event->xCorrelationToken != 0) {
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atomic_t *aptr= (atomic_t *)event->xCorrelationToken;
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atomic_set(aptr, 1);
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} else
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printk(KERN_WARNING
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"hvc: weird...got open ack without atomic\n");
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return;
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}
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/* This had better require an ack, otherwise complain */
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if (!hvlpevent_need_ack(event)) {
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printk(KERN_WARNING "hvc: viocharopen without ack bit!\n");
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return;
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}
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spin_lock_irqsave(&consolelock, flags);
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/* Make sure this is a good virtual tty */
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if (port >= VTTY_PORTS) {
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event->xRc = HvLpEvent_Rc_SubtypeError;
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cevent->subtype_result_code = viorc_openRejected;
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/*
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* Flag state here since we can't printk while holding
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* the consolelock spinlock.
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*/
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reject = 1;
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} else {
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pi = &port_info[port];
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if ((pi->lp != HvLpIndexInvalid) &&
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(pi->lp != event->xSourceLp)) {
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/*
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* If this is tty is already connected to a different
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* partition, fail.
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*/
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event->xRc = HvLpEvent_Rc_SubtypeError;
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cevent->subtype_result_code = viorc_openRejected;
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reject = 2;
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} else {
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pi->lp = event->xSourceLp;
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event->xRc = HvLpEvent_Rc_Good;
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cevent->subtype_result_code = viorc_good;
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pi->seq = pi->ack = 0;
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}
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}
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spin_unlock_irqrestore(&consolelock, flags);
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if (reject == 1)
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printk(KERN_WARNING "hvc: open rejected: bad virtual tty.\n");
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else if (reject == 2)
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printk(KERN_WARNING "hvc: open rejected: console in exclusive "
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"use by another partition.\n");
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/* Return the acknowledgement */
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HvCallEvent_ackLpEvent(event);
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}
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/*
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* Handle a close charLpEvent. This should ONLY be an Interrupt because the
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* virtual console should never actually issue a close event to the hypervisor
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* because the virtual console never goes away. A close event coming from the
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* hypervisor simply means that there are no client consoles connected to the
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* virtual console.
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|
||||||
*/
|
|
||||||
static void hvc_close_event(struct HvLpEvent *event)
|
|
||||||
{
|
|
||||||
unsigned long flags;
|
|
||||||
struct viocharlpevent *cevent = (struct viocharlpevent *)event;
|
|
||||||
u8 port = cevent->virtual_device;
|
|
||||||
|
|
||||||
if (!hvlpevent_is_int(event)) {
|
|
||||||
printk(KERN_WARNING
|
|
||||||
"hvc: got unexpected close acknowledgement\n");
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (port >= VTTY_PORTS) {
|
|
||||||
printk(KERN_WARNING
|
|
||||||
"hvc: close message from invalid virtual device.\n");
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* For closes, just mark the console partition invalid */
|
|
||||||
spin_lock_irqsave(&consolelock, flags);
|
|
||||||
|
|
||||||
if (port_info[port].lp == event->xSourceLp)
|
|
||||||
port_info[port].lp = HvLpIndexInvalid;
|
|
||||||
|
|
||||||
spin_unlock_irqrestore(&consolelock, flags);
|
|
||||||
}
|
|
||||||
|
|
||||||
static void hvc_data_event(struct HvLpEvent *event)
|
|
||||||
{
|
|
||||||
unsigned long flags;
|
|
||||||
struct viocharlpevent *cevent = (struct viocharlpevent *)event;
|
|
||||||
struct port_info *pi;
|
|
||||||
int n;
|
|
||||||
u8 port = cevent->virtual_device;
|
|
||||||
|
|
||||||
if (port >= VTTY_PORTS) {
|
|
||||||
printk(KERN_WARNING "hvc: data on invalid virtual device %d\n",
|
|
||||||
port);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
if (cevent->len == 0)
|
|
||||||
return;
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Change 05/01/2003 - Ryan Arnold: If a partition other than
|
|
||||||
* the current exclusive partition tries to send us data
|
|
||||||
* events then just drop them on the floor because we don't
|
|
||||||
* want his stinking data. He isn't authorized to receive
|
|
||||||
* data because he wasn't the first one to get the console,
|
|
||||||
* therefore he shouldn't be allowed to send data either.
|
|
||||||
* This will work without an iSeries fix.
|
|
||||||
*/
|
|
||||||
pi = &port_info[port];
|
|
||||||
if (pi->lp != event->xSourceLp)
|
|
||||||
return;
|
|
||||||
|
|
||||||
spin_lock_irqsave(&consolelock, flags);
|
|
||||||
|
|
||||||
n = IN_BUF_SIZE - pi->in_end;
|
|
||||||
if (n > cevent->len)
|
|
||||||
n = cevent->len;
|
|
||||||
if (n > 0) {
|
|
||||||
memcpy(&pi->in_buf[pi->in_end], cevent->data, n);
|
|
||||||
pi->in_end += n;
|
|
||||||
}
|
|
||||||
spin_unlock_irqrestore(&consolelock, flags);
|
|
||||||
if (n == 0)
|
|
||||||
printk(KERN_WARNING "hvc: input buffer overflow\n");
|
|
||||||
}
|
|
||||||
|
|
||||||
static void hvc_ack_event(struct HvLpEvent *event)
|
|
||||||
{
|
|
||||||
struct viocharlpevent *cevent = (struct viocharlpevent *)event;
|
|
||||||
unsigned long flags;
|
|
||||||
u8 port = cevent->virtual_device;
|
|
||||||
|
|
||||||
if (port >= VTTY_PORTS) {
|
|
||||||
printk(KERN_WARNING "hvc: data on invalid virtual device\n");
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
spin_lock_irqsave(&consolelock, flags);
|
|
||||||
port_info[port].ack = event->xCorrelationToken;
|
|
||||||
spin_unlock_irqrestore(&consolelock, flags);
|
|
||||||
}
|
|
||||||
|
|
||||||
static void hvc_config_event(struct HvLpEvent *event)
|
|
||||||
{
|
|
||||||
struct viocharlpevent *cevent = (struct viocharlpevent *)event;
|
|
||||||
|
|
||||||
if (cevent->data[0] == 0x01)
|
|
||||||
printk(KERN_INFO "hvc: window resized to %d: %d: %d: %d\n",
|
|
||||||
cevent->data[1], cevent->data[2],
|
|
||||||
cevent->data[3], cevent->data[4]);
|
|
||||||
else
|
|
||||||
printk(KERN_WARNING "hvc: unknown config event\n");
|
|
||||||
}
|
|
||||||
|
|
||||||
static void hvc_handle_event(struct HvLpEvent *event)
|
|
||||||
{
|
|
||||||
int charminor;
|
|
||||||
|
|
||||||
if (event == NULL)
|
|
||||||
return;
|
|
||||||
|
|
||||||
charminor = event->xSubtype & VIOMINOR_SUBTYPE_MASK;
|
|
||||||
switch (charminor) {
|
|
||||||
case viocharopen:
|
|
||||||
hvc_open_event(event);
|
|
||||||
break;
|
|
||||||
case viocharclose:
|
|
||||||
hvc_close_event(event);
|
|
||||||
break;
|
|
||||||
case viochardata:
|
|
||||||
hvc_data_event(event);
|
|
||||||
break;
|
|
||||||
case viocharack:
|
|
||||||
hvc_ack_event(event);
|
|
||||||
break;
|
|
||||||
case viocharconfig:
|
|
||||||
hvc_config_event(event);
|
|
||||||
break;
|
|
||||||
default:
|
|
||||||
if (hvlpevent_is_int(event) && hvlpevent_need_ack(event)) {
|
|
||||||
event->xRc = HvLpEvent_Rc_InvalidSubtype;
|
|
||||||
HvCallEvent_ackLpEvent(event);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
static int __init send_open(HvLpIndex remoteLp, void *sem)
|
|
||||||
{
|
|
||||||
return HvCallEvent_signalLpEventFast(remoteLp,
|
|
||||||
HvLpEvent_Type_VirtualIo,
|
|
||||||
viomajorsubtype_chario | viocharopen,
|
|
||||||
HvLpEvent_AckInd_DoAck, HvLpEvent_AckType_ImmediateAck,
|
|
||||||
viopath_sourceinst(remoteLp),
|
|
||||||
viopath_targetinst(remoteLp),
|
|
||||||
(u64)(unsigned long)sem, VIOVERSION << 16,
|
|
||||||
0, 0, 0, 0);
|
|
||||||
}
|
|
||||||
|
|
||||||
static int __init hvc_vio_init(void)
|
|
||||||
{
|
|
||||||
atomic_t wait_flag;
|
|
||||||
int rc;
|
|
||||||
|
|
||||||
if (!firmware_has_feature(FW_FEATURE_ISERIES))
|
|
||||||
return -EIO;
|
|
||||||
|
|
||||||
/* +2 for fudge */
|
|
||||||
rc = viopath_open(HvLpConfig_getPrimaryLpIndex(),
|
|
||||||
viomajorsubtype_chario, VIOCHAR_WINDOW + 2);
|
|
||||||
if (rc)
|
|
||||||
printk(KERN_WARNING "hvc: error opening to primary %d\n", rc);
|
|
||||||
|
|
||||||
if (viopath_hostLp == HvLpIndexInvalid)
|
|
||||||
vio_set_hostlp();
|
|
||||||
|
|
||||||
/*
|
|
||||||
* And if the primary is not the same as the hosting LP, open to the
|
|
||||||
* hosting lp
|
|
||||||
*/
|
|
||||||
if ((viopath_hostLp != HvLpIndexInvalid) &&
|
|
||||||
(viopath_hostLp != HvLpConfig_getPrimaryLpIndex())) {
|
|
||||||
printk(KERN_INFO "hvc: open path to hosting (%d)\n",
|
|
||||||
viopath_hostLp);
|
|
||||||
rc = viopath_open(viopath_hostLp, viomajorsubtype_chario,
|
|
||||||
VIOCHAR_WINDOW + 2); /* +2 for fudge */
|
|
||||||
if (rc)
|
|
||||||
printk(KERN_WARNING
|
|
||||||
"error opening to partition %d: %d\n",
|
|
||||||
viopath_hostLp, rc);
|
|
||||||
}
|
|
||||||
|
|
||||||
if (vio_setHandler(viomajorsubtype_chario, hvc_handle_event) < 0)
|
|
||||||
printk(KERN_WARNING
|
|
||||||
"hvc: error seting handler for console events!\n");
|
|
||||||
|
|
||||||
/*
|
|
||||||
* First, try to open the console to the hosting lp.
|
|
||||||
* Wait on a semaphore for the response.
|
|
||||||
*/
|
|
||||||
atomic_set(&wait_flag, 0);
|
|
||||||
if ((viopath_isactive(viopath_hostLp)) &&
|
|
||||||
(send_open(viopath_hostLp, &wait_flag) == 0)) {
|
|
||||||
printk(KERN_INFO "hvc: hosting partition %d\n", viopath_hostLp);
|
|
||||||
while (atomic_read(&wait_flag) == 0)
|
|
||||||
mb();
|
|
||||||
atomic_set(&wait_flag, 0);
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* If we don't have an active console, try the primary
|
|
||||||
*/
|
|
||||||
if ((!viopath_isactive(port_info[0].lp)) &&
|
|
||||||
(viopath_isactive(HvLpConfig_getPrimaryLpIndex())) &&
|
|
||||||
(send_open(HvLpConfig_getPrimaryLpIndex(), &wait_flag) == 0)) {
|
|
||||||
printk(KERN_INFO "hvc: opening console to primary partition\n");
|
|
||||||
while (atomic_read(&wait_flag) == 0)
|
|
||||||
mb();
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Register as a vio device to receive callbacks */
|
|
||||||
rc = vio_register_driver(&hvc_vio_driver);
|
|
||||||
|
|
||||||
return rc;
|
|
||||||
}
|
|
||||||
module_init(hvc_vio_init); /* after drivers/char/hvc_console.c */
|
|
||||||
|
|
||||||
static void __exit hvc_vio_exit(void)
|
|
||||||
{
|
|
||||||
vio_unregister_driver(&hvc_vio_driver);
|
|
||||||
}
|
|
||||||
module_exit(hvc_vio_exit);
|
|
||||||
|
|
||||||
/* the device tree order defines our numbering */
|
|
||||||
static int __init hvc_find_vtys(void)
|
|
||||||
{
|
|
||||||
struct device_node *vty;
|
|
||||||
int num_found = 0;
|
|
||||||
|
|
||||||
for (vty = of_find_node_by_name(NULL, "vty"); vty != NULL;
|
|
||||||
vty = of_find_node_by_name(vty, "vty")) {
|
|
||||||
const uint32_t *vtermno;
|
|
||||||
|
|
||||||
/* We have statically defined space for only a certain number
|
|
||||||
* of console adapters.
|
|
||||||
*/
|
|
||||||
if ((num_found >= MAX_NR_HVC_CONSOLES) ||
|
|
||||||
(num_found >= VTTY_PORTS)) {
|
|
||||||
of_node_put(vty);
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
|
|
||||||
vtermno = of_get_property(vty, "reg", NULL);
|
|
||||||
if (!vtermno)
|
|
||||||
continue;
|
|
||||||
|
|
||||||
if (!of_device_is_compatible(vty, "IBM,iSeries-vty"))
|
|
||||||
continue;
|
|
||||||
|
|
||||||
if (num_found == 0)
|
|
||||||
add_preferred_console("hvc", 0, NULL);
|
|
||||||
hvc_instantiate(*vtermno, num_found, &hvc_get_put_ops);
|
|
||||||
++num_found;
|
|
||||||
}
|
|
||||||
|
|
||||||
return num_found;
|
|
||||||
}
|
|
||||||
console_initcall(hvc_find_vtys);
|
|
||||||
Loading…
Reference in New Issue